I think I finally entered depression. My sons father is trying to make my life hell and its so…

I think I finally entered depression. My sons father is trying to make my life hell and its so unfair. I have no friends and the inky person I'm around is always so mean. I find myself crying everyday when my son is asleep. I force myself to look happy when my son is watching but the truth is I'm miserable. Things would he so .much easier if he would just leave my son and I alone. He only wants to stay for control and to make me miserable for making him choose between his son and I and living recklessly doing drugs. I'm the bad guy for wanting the best for my baby. No one is asking him to stay I'm actually asking him to go. His response is I will never leave ever I don't care if you want me here or not. He says if he does leave he will take my son from me and won't stop for cops or anything. Oh and we live in my dads house on top of it all. idk what to do anymore :(